Engine swap help - Blown ECU?
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Engine swap help - Blown ECU?
Hello guys.
I'm swapping the engine out from an Audi A6/C4 2.8 V6 (AAH) in an Audi 90 NG.
I got the engine wiring harness in, tho NO engine in place.
I wire up the ECU, green to the fuel pump relay (I used the 2.3 Audi 90 relay I had), black to 15, and black/green with that grounding "o ring" end to ground. small red goes to 30 (B+) and that's it. I haven't hooked up anything, because its not needed as by the schematics.
I turn the key to ignition with the ECU in place but no engine, fuel pump relay engages and primes for 2-3 seconds and shuts off. I turn the key to off position, then to ignition again, NOTHING. Absolutely nothing happens. I tried removing the battery terminals and putting them back in to reset the ECU; no. I have power everywhere I should. Afaik I only need the yellow thermo-fuse holder to be on when the key is on ignition. The relay does NOT engage no matter what I do. It almost sounds like it wants to, but sounds like it has no power? It shakes JUST A TINY bit when key is on, but it does not move the contact points in the relay.
My question is, could I have fried the ECU in any way? I read that fuel pump wont prime or turn on at ALL until engine is being cranked at min of 28RPM? Is that true?
I really hope the ECU is not gone. I need all the help and info/advice I can get here.
I'm swapping the engine out from an Audi A6/C4 2.8 V6 (AAH) in an Audi 90 NG.
I got the engine wiring harness in, tho NO engine in place.
I wire up the ECU, green to the fuel pump relay (I used the 2.3 Audi 90 relay I had), black to 15, and black/green with that grounding "o ring" end to ground. small red goes to 30 (B+) and that's it. I haven't hooked up anything, because its not needed as by the schematics.
I turn the key to ignition with the ECU in place but no engine, fuel pump relay engages and primes for 2-3 seconds and shuts off. I turn the key to off position, then to ignition again, NOTHING. Absolutely nothing happens. I tried removing the battery terminals and putting them back in to reset the ECU; no. I have power everywhere I should. Afaik I only need the yellow thermo-fuse holder to be on when the key is on ignition. The relay does NOT engage no matter what I do. It almost sounds like it wants to, but sounds like it has no power? It shakes JUST A TINY bit when key is on, but it does not move the contact points in the relay.
My question is, could I have fried the ECU in any way? I read that fuel pump wont prime or turn on at ALL until engine is being cranked at min of 28RPM? Is that true?
I really hope the ECU is not gone. I need all the help and info/advice I can get here.
Thread Starter
AudiWorld Newcomer
Joined: Nov 2016
Posts: 4
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Cheers.
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